Method of evaluating stability of strip filling body

The invention discloses a method of evaluating stability of a strip filling body. The method of evaluating stability of a strip filling body includes the steps: collecting the geological data and the strip filling mining parameter of a strip filling operation surface to be determined; testing the cohesive force C and the inner angle phi of friction of a cemented filling body, and according to a Coulomb criterion equation, combining with the rock stratum unit weight and the coal seam burial depth, obtaining the ultimate strength sigma 1 of the cemented filling body; according to the coal seam burial depth H, the mining thickness m, the strip filling body width a, and the strip filling body interval b parameter, respectively calculating the strip filling body plastic zone width Y, the strip filling body ultimate load sigma j and the strip filling body column practical bearing load sigma P; according to the ultimate load sigma j and the practical born load sigma P, calculating the strip filling body stability co